Drill attachment for mixing paints and the like



July 16, 1957 I. SILVERMAN DRILL ATTACHMENT FOR MIXING PAINTS AND THELIKE- Filed Jan. 28, 1955 JNVENTOR. SILVERMAN United States Patent DRILLATTACHMENT FOR MIXING PAINTS AND THE LIKE Isaac Silverman, Bronx, N. Y.

Application January 28, 1955, Serial No. 484,623

1 Claim. (Cl. 259-134) This invention relates to new and usefulimprovements in mixing devices for stirring or mixing paint and thelike.

More particularly, the present invention proposes the construction of animproved drill attachment which will fit in the chuck of an ordinaryhand electric drill and which will mix or stir the contents of a paintcan or other container.

As a further object, the present invention proposes forming theattachment with an elongated shaft having a mixing blade removablysecured to its lower end and an extension stem projecting below themixing blade to space the blade away from the bottom of the container,the contents of which are being mixed.

Another object of the present invention proposes constructing the shaftof the attachment so that it will fit in any one of a number of drillchucks and forming the extension stem so that it will space the mixingblade a predetermined distance above the bottom of a container.

As a still further object, the present invention proposes constructingthe attachment so that the mixing blade will normally be held apredetermined distance from the bottom of a container but also so suchdistance can be varied during the operation of the mixing blade.

For further comprehension of the invention, and of the objects andadvantages thereof, reference will be had to the following descriptionand accompanying drawings, and to the appended claim in which thevarious novel features of the invention are more particularly set forth.

In the accompanying drawings forming a material part of this disclosure:

Fig. l is a side view of a full paint can partly broken away and of anelectric hand drill with a drill attachment for mixing paint and thelike constructed and arranged in accordance with the present invention.

Fig. 2 is a perspective view of the drill attachment with I the lowerend broken away.

Fig. 3 is a fragmentary view of the lower end of the device with partsbroken away and in section.

Fig. 4 is a sectional view taken on line 44 of Fig. 3.

Fig. 5 is a top plan view of the lowermost blade or paddle.

Fig. 6 is a side view of the blade shown in Fig. 5 but with parts brokenaway.

Fig. 7 is a view similar to Fig. 4 but illustrating a modification ofthe present invention.

Fig. 8 is a view similar to Figs. 4 and 7 but illustrating anothermodification.

Fig. 9 is a view similar to Fig. 3 but illustrating still anothermodification of the present invention.

The drill attachment, in accordance with the first form of the inventionillustrated in Figs. 1 to 6 inclusive, is designated generally by thereference numeral 15.

Drill attachment has an elongated shaft 16 with an upper end portion 17adapted to fit in the chuck of an electric hand drill 18 or in astanding drill press (not shown). An axially disposed keyway or slot 19extends substantially the full length of the shaft 16.

2,799,485 Patented July 16, 195.7

' The lower end 20 of shaft 16 has a shoulder 23' and the blade 21 restson the shoulder and is secured to the shaft 16 by a set screw 13'. Thelower end 20 of shaft 16 also contains an axial opening 23.

Mixing blade 21 has a hub 24 with an axial hub opening 25 adapted to fitaround the shaft 16 and with an inwardly projecting key 24' slidable inkeyway 19. Mixing blade 21 also has four spaced blades or vanes 26, 27,28 and 29 extending radially from the hub and pitched in the manner of afour-bladed propeller.

A second mixing blade 13 is provided. Blade 13 has a hub 12 with anaxial opening 11 alignable with the axial opening in the lower end 20 ofshaft 16. Mixing blade 13 also has four spaced bladesor vanes 10, 9, 8and 7 with downturned portions 6. s f:

Extension stem 22 has a threaded upper end portion 30 of reduceddiameter adapted to extend through the axial hub opening 11 of thesecond mixing blade 13 and removable to screw into the threaded axialopening 23 in the lower end 20 of the shaft 16. An extension cap 31 fitson the threaded lower end 31' of extension stem 22 and is adapted torest on the bottom 32 of a container 33 inside of the container. Thelength of the extension cap 31 and stem 22 is such as to dispose the twomixing blades submerged in the paint or other contents 34 of the can orcontainer 33. The extension stern and cap spaces the lower mixing blade13 from the bottom 32 of the container 33 for rotation in the containerwith the downturned portions 6 of its blades 10, 9, 8 and 7 disposed toscrape material from the bottom of the can. The extension stem 22 hasspaced openings 35 and the cap 31 has a set screw 35' adapted to fitopenings 35. Thus the blades 13 and 21 may be raised or lowered byfixing the cap 31 on the extension stem at difierent heights.

The modification of the invention illustrated in Fig. 7 is characterizedby the provision of a round shaft 36 in place of the grooved shaft 16shown in Figs. 1 to 6, inclusive. The mixing blade 37 and extension stem38 are like those shown in the first six figures and described above;

The modification illustrated in Fig. 8 is characterized by the provisionof a shaft 40 having an outwardly projecting axial key or extension 41extending substantially the length of the shaft. The mixing blade 42 andextension stem 43 are like those described above and shown in Figs. 1 to6 inclusive.

The modification of the present invention illustrated in Fig. 9 ischaracterized by the provision of an elongated shaft 45 having a lowerend 46 with an axial shaft opening 47. A mixing blade 48 has a hub 49with an axial hub opening 50 alignable with the axial opening 47 in thelower end 46 of the shaft 45. The mixing blade 48 also has a pluralityof blades or vanes 51 radiating from the hub 49.

An extension stem 52 is provided normally to hold the mixing blade 48 tothe shaft 45. Extension stem 52 has a threaded lower end 53 and a headedupper end 54 with a smooth intermediate or upper end portion 55 betweenthe two end portions. The smooth portion 55 of the stem 52 extendsslidably and rotatably through the hub opening 50 and into the shaftopening 47. A bottom or lower end seat 56 at the lower end 46 of theshaft 45 adjacent the shaft opening 47 prevents the headed upper end 54of extension stem 52 from coming out of the shaft opening 47.

An internally threaded stem end member or cap 57 screws on the threadedlower end 53 of extension stem 52 and a coil spring 58 encircles thestem 52. A set screw 57 holds the cap 57 in place on the stem 52. The

ends 59 and 60 of the 'coil spring 58 abut the hub 49 and the stemendmemberorcap 57 respectively resiliently to bias the stem end memberaway from the hub.

To fix the hub 49 of the mixing blade 48 to the shaft 45 atiall times,the hub 49 contains a keyway 61 and the shaft 45 has a like alignablekeyway-62 both adapted to receive a single key63.

While I have illustrated and described the preferred embodiments of myinvention, it is to be'understood that I do not limit myself to theprecise constructions herein 1.0

disclosed and that various changes and modifications may be made withinthe scope of the invention as defined in theappended claim.

Having thus described my invention, what I'claim as new, and desire tosecure by United States Letters Patent Apparatus for mixing paint andthe like comprising a vertically disposed elongated shaft having anupper end adapted to fit into the chuck of electricallyactuated-mechanism and having a lower end, a mixing blade secured to thelower end of said shaft and an extension stem projecting below themixing blade to space said blade from the bottom of a paint container,the contents of which is being mixed, said stem having spaced transverseopenings therethrough, said mixing blade having a hub removably securedto the shaft and a plurality of pitched vanes, an extension cap slidablymounted on the end of the extension stem, said cap having an opening inits wall adjacent the inner end thereof, and a set screw in the openingin said cap adapted to seat in one of said spaced openings in the stemfor adjusting the distance of the blade from the bottom of thecontainer, and a mixing and scraping blade secured to the bottom of saidextension stem.

References Cited in the file of this patent UNITED STATES PATENTS1,519,533 Dingle Dec. 16, 1924 2,530,858 Cerniak Nov. 21, 1950 FOREIGNPATENTS 459,932 Great Britain Apr. 9, 1935

